Railroad crossing intersection



March 22, 1932.

J. R. JONES ET AL RAILROAD GROSS ING INTERSECTION Filed Dec. 9, 1931INVENTORS kf/IMEJ Ek//VES. V [YOl I/AEQEMLLE BY HIS ATTORNEYS PatentedMar. 1932 UNITED FST'ATES PATENT oar-ice urns B. JONES AND HOWARD E.KILLER, OI J'OHNS'I'OWN, PENNSYLVANIA i mmoan caossme. mmsnc'rronApplication Med December 8, 1981. Serial No. 578,861.

This invention relates to railroad rails and shapes and moreparticularly to railroad crossing intersections comprised of cast steelor alloy steel such as manganese steel.

In the manufacture of railroad, crossings of caststeel or alloy steel itis highly .essen-tial to so distribute the material of the casting thatinternal stresses or strains incident to the cooling of the molten metalis not obtained. It is also essential that the distribution of the metalin the casting be such as to reinforce and support'the structure underservice conditions. Heretofore in the art many structures for steelrailroad crossings have been proposed but all have certain defectseither in the method of manufacture employed 01;. in the operating lifeand maintenance which it is one of the objects of the present inventionto eliminate.

Another objectof this invention is to provide an improved cast steelrailroad crossing load and hammer blows of passing wheels,

and of providing a casting construction adapted to givean equalizationin the cooling strains in the cast structure, thus preventing thedevelopment of shrinkage cracks therein.

Reference should be made to the accompanying drawings wherein Fig. 1illustrates in plan view the reinforced railroad crossing intersectionof the present invention;

Fig. 2 is a horizontal section of the same;

Fig. 3 is a section along plane 3-3, Fig.

Fig. 4 is a section along plane 4-4, Fig. Referring to the drawings, therallroad crossing intersection shown comprises the usual tread 1, andsupporting frame including outer wall 2 having flange feet 3 and innerwall 4 having flange feet 5. Outer and inner walls are supported bytransverse ribs 6 having flange feet 7.

. Inthe practice of the resent invention we provide curved verticasupporting ribs 8 having interiorly extending flange feet 9, the

curvature of the ribs being concentric with respect to the curvature ofthe outer wall 2 and the size of the interiorly extending flan e feet 9being approximately identical to t e size of flange feet 3 and 5of'walls 2 and 4.- re.-

s ct ively, and s aced from wall'2 so that t e rib supportst e treadportion at a point adjacent the intersection. I By this arrangement ofelements in a cross ing intersection the curved vertical supporting ribsafford a support for the tread portion at a point where it is mostneeded, and

provides means to transmit the load or hammer blows of the passingwheels to all of the cross tles supporting the structure. By theprovision of interiorly disposed flange feet on the curved rib elementsthe transmission of the t-rafiic load to the cross ties is facilitatedand their position tends to counterpoise the intersection structure andto resist interior displacement of the rail tread.

In addition dueto the absence of transverse ribs and to the particulardesign of rib and flange feet, material shrinkage of metal duringcooling is prevented and deleterious efiects due to shrinkage cracks andfissures because of insuflicient casting metal at the tread intersectionis substantially eliminated.

Preferably, but not necessarily, the rail intersection' of the presentinvention is com prised of manganese alloy steel. Other steelcompositions may be employed, if desired.

Having disclosed the present invention with particularity it is apparentthat many modifications and departures may be made therein withoutdeparting essentially from the nature and scope thereof as may set forthin the accompanying claims.

What we claim is: 1. In a cast steel railroad crossing intersection,interiorly disposed vertical supporting ribs therefor, said ribs beingcurved concentrically with respect to the outer wall of saidintersection.

2. In a cast steel railroad crossing intersection, interiorly disposedvertical supporting ribs therefor, said ribs being curved concentricallywith respect to the outer wall of said intersection and being spacedtherefrom a distance adapted to bring the supporting rib under the treadportions of the crossing at a point adjacent the intersection of thesame. 3. In a cast steel railroad crossing intersection, interiorlydisposed vertical supporting ribs therefor, said ribs being curvedconcentrically with respect to the outer wall of said intersection andbeing spaced therefrom a distance adapted to bring the supporting ribunder'the tread portions of the crossing at a point adjacent theintersection of the same, said ribs also carrying flange feetextensions, said feet extending interiorly from said outer wall.

4. In a cast steel railroad crossing intersection, interiorly disposedvertical supporting ribs therefor, said ribs being curved concentricallywith respect to the outer wall of said intersection, said ribs havingflange feet extensions adapted to extend interiorly therefrom.

5. A railroad crossing intersection comprised of cast steel including abase, tread portions in said base, supporting walls therefor, andinterior vertical supporting rib members, said rib members being curvedand disposed substantially concentric with re spect to the outer wall ofthe intersection and spaced therefrom a distance adapted to bring thesame under the tread portions at a point adjacent the intersection ofthe same.

6. A railroad crossing intersection comprised of cast steel including abase, tread portions in said base, supporting Walls therefor, andinterior vertical supporting rib members, said rib members being curvedand disposed substantially concentric with respect to the outer wall ofthe intersection and spaced therefrom a distance adapted to bring thesame under the tread portions at a point adjacent the intersection ofthe same, said curved rib members also carrying flange feet extensionsdisposed interiorly from the outer wall. A

In witness whereof, we have hereunto signed our names.

JAMES R. JONES. HOWARD E. MILLER.

